Device for preventing anode slurry from agglomerating in sodium battery coating

Abstract

The utility model discloses a device for preventing anode slurry from agglomerating during sodium battery coating, and belongs to the technical field of sodium batteries. The utility model relates to a device for preventing anode slurry from agglomerating in sodium battery coating, which comprises a bracket, a material storage tank, a sealing cover, an anode slurry storage tank, an anode slurry storage tank, an anode slurry storage tank, an anode slurry storage tank, an anode slurry storage tank and a cathode slurry storage tank, and is characterized in that the anode slurry storage tank is arranged in the anode slurry storage tank, and the sealing cover is connected onto the anode slurry storage tank; the stirring paddle is rotationally connected into the storage tank; the nitrogen pipeline is fixedly connected to the sealing cover, and the nitrogen pipeline is used for injecting nitrogen into the storage tank; slurry is stirred and discharged through the stirring paddle for coating, the contact time of the slurry and air is short, the stability of the slurry is ensured, the discharging speed is controlled according to the amount of the slurry used for coating, the slurry is not agglomerated in the coating process, the operation is simple, the stability of the density of a coating surface can be ensured, and the coating quality is improved. Therefore, the consistency of the capacity of the battery cell is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sodium batteries, in particular to a device for preventing agglomeration of positive electrode slurry during coating of sodium batteries. Background Art

[0002] With the development of science and technology, lithium-ion batteries are widely used in electric vehicles, electronic equipment and other fields as an important energy storage device. In recent years, with the continuous increase in market demand for lithium-ion batteries, the shortage of lithium resources has become the primary problem for the future large-scale application of lithium-ion batteries. Compared with lithium resources, sodium resources have the advantages of wide distribution, low cost, and convenient development. Sodium and lithium have many similarities in physical and chemical properties, but after the homogenization of sodium-ion battery positive electrode materials, the pH value of the discharged material increases rapidly in the air, and the slurry will quickly agglomerate, resulting in uneven coating surface density and even dispersed capacity distribution of the output sodium battery.

[0003] Existing laboratory conditions are limited and coating equipment cannot solve the problem of slurry agglomeration caused by the increase in pH value of sodium battery positive electrode materials. The slurry used in laboratory coating is in a stopped stirring state and needs to be manually loaded into the stirring tank of the coating machine. The operation is cumbersome and the slurry is in contact with the air for a long time, causing the pH to increase, resulting in unstable density after coating, dispersed capacity of the finished battery cells, inaccurate material evaluation, and a series of other problems such as material waste.

[0004] Therefore, a device for preventing agglomeration of positive electrode slurry for coating sodium batteries is provided to solve the above-mentioned problems. Utility Model Content

[0005] The purpose of the utility model is to solve the problems raised in the above background technology, and to propose a device for preventing agglomeration of positive electrode slurry in sodium battery coating.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A device for preventing agglomeration of positive electrode slurry during coating of a sodium battery comprises a bracket and a storage tank, wherein the storage tank is mounted on the bracket and contains positive electrode slurry, and further comprises:

[0008] A sealing cover connected to the storage tank;

[0009] A stirring paddle, rotatably connected to the storage tank;

[0010] A nitrogen pipeline is fixedly connected to the sealing cover, and is used to inject nitrogen into the storage tank. A control switch for controlling the gas volume is connected to the outside of the nitrogen pipeline;

[0011] A discharge pipe connected to the bottom of the storage tank;

[0012] A discharge switch is connected to the discharge pipe.

[0013] In order to rotate the stirring paddle, preferably, a motor is fixedly connected to the sealing cover, and an output end of the motor passes through the sealing cover, and the output end of the motor is fixedly connected to the stirring paddle.

[0014] In order to improve the sealing performance, preferably, an annular air bag is connected to the outer ring of the sealing cover for filling the gap between the sealing cover and the storage tank.

[0015] In order to improve the sealing performance, preferably, an annular airbag 2 for filling the motor output shaft is connected inside the sealing cover.

[0016] Preferably, the sealing cover is connected to an air pump, and the air outlet end of the air pump is connected to an air outlet pipe, and the air outlet pipe is used to supply air to the annular airbag 1 and the annular airbag 2.

[0017] In order to control the rotation speed, preferably, the storage tank is connected to a controller for controlling the rotation speed of the stirring paddle.

[0018] In order to facilitate installation, preferably, the sealing cover is connected to a mounting bracket, and the mounting bracket is connected to a threaded rod, through which the sealing cover can be installed on the storage tank.

[0019] Compared with the prior art, the present invention provides a device for preventing agglomeration of positive electrode slurry during coating of sodium batteries, which has the following beneficial effects:

[0020] The utility model keeps the slurry used for coating in a stirring state with an adjustable speed by means of a storage tank, thereby ensuring that the slurry does not agglomerate in a sealed space. The amount of slurry used for coating can be controlled by a discharge switch at a flow rate to reduce the tediousness of manual loading. Nitrogen gas needs to be intervened during discharge, and the operation is simple. The coating surface density can be ensured to be stable, thus reducing waste of experimental materials and improving the consistency of the capacity of finished sodium batteries. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of a device for preventing agglomeration of positive electrode slurry in sodium battery coating proposed by the utility model;

[0022] Figure 2 This utility model proposes a device for preventing agglomeration of positive electrode slurry in sodium battery coating. Figure 1 Schematic diagram of the structure of part A;

[0023] Figure 3 This utility model proposes a device for preventing agglomeration of positive electrode slurry in sodium battery coating. Figure 1 Schematic diagram of the structure of part B.

[0024] In the figure: 1. bracket; 2. storage tank; 3. positive electrode slurry; 4. sealing cover; 401. air pump; 4011. outlet pipe; 402. annular airbag 1; 403. annular airbag 2; 404. mounting bracket; 5. stirring paddle; 501. motor; 6. nitrogen pipeline; 7. controller; 8. discharge switch; 9. discharge pipeline. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0026] Example:

[0027] Reference Figure 1-3 , a device for preventing agglomeration of positive electrode slurry in sodium battery coating, comprising a bracket 1, a storage tank 2, the storage tank 2 being mounted on the bracket 1, the storage tank 2 containing positive electrode slurry 3, and further comprising: a sealing cover 4 connected to the storage tank 2; a stirring paddle 5 rotatably connected to the storage tank 2; a nitrogen pipeline 6 fixedly connected to the sealing cover 4, the nitrogen pipeline 6 being used to inject nitrogen into the storage tank 2, the nitrogen pipeline 6 being externally connected to a control switch for controlling the gas size; a discharge pipeline 9 connected to the bottom of the storage tank 2; a discharge switch 8 connected to the discharge pipeline 9, a motor 501 being fixedly connected to the sealing cover 4, the output end of the motor 501 passing through the sealing cover 4, the output end of the motor 501 The outlet end is fixedly connected to the stirring paddle 5, and the outer ring of the sealing cover 4 is connected to an annular airbag 1 402 for filling the gap between the sealing cover 4 and the storage tank 2, and the sealing cover 4 is connected to an annular airbag 2 403 for filling the output shaft of the motor 501. The sealing cover 4 is connected to an air pump 401, and the air outlet end of the air pump 401 is connected to an air outlet pipe 4011, and the air outlet pipe 4011 is used to supply air to the annular airbag 1 402 and the annular airbag 2 403. The storage tank 2 is connected to a controller 7 for controlling the speed of the stirring paddle 5, and the sealing cover 4 is connected to a mounting bracket 404. The mounting bracket 404 is connected with a threaded rod, and the sealing cover 4 can be installed on the storage tank 2 through the threaded rod.

[0028] The purpose of this device is to solve the problems that the existing coating device in the laboratory will cause the stability of the sodium battery positive electrode slurry 3 to be uncontrolled, the slurry is in contact with the air for a long time on the coating machine, manual loading is required, the coating surface density is unstable, affecting the output of the finished battery cell capacity, affecting product evaluation, and wasting materials.

[0029] The bracket 1 is an L-shaped split rack on both sides, and the width of the bracket 1 can be adjusted according to the size of the storage tank 2;

[0030] Storage tank 2 is a stainless steel anti-corrosion cylindrical tank;

[0031] The stirring paddle 5 is in the shape of a mountain and is made of corrosion-resistant stainless steel;

[0032] First, the positive electrode slurry 3 after the mixing is completed is transferred to the storage tank 2, covered with a sealing cover 4 and fixed with a threaded metal rod, and the storage tank 2 is placed on the L-shaped brackets 1 on both sides, and then the motor 501 is started to keep the slurry in a stirring state. When the coating starts, the discharge switch 8 is turned on, and the positive electrode slurry 3 enters the stirring tank used for coating through the discharge pipe 9. No manual loading is required, the operation is simple, and the coating surface density can be ensured to be stable, thereby reducing the waste of experimental materials and improving the consistency of the capacity of the finished sodium battery;

[0033] It should be noted that when the positive electrode slurry 3 is discharged, nitrogen needs to be continuously injected through the nitrogen pipeline 6, and the discharge speed of the positive electrode slurry 3 can be adjusted by the speed of nitrogen injection.

[0034] The annular airbag 1 402 and the annular airbag 2 403 are respectively used to seal the gap between the sealing cover 4 and the storage tank 2, and the gap between the rotating end of the sealing motor 501 and the sealing cover 4, so as to reduce gas leakage and improve the sealing performance. When in use, gas is injected into the airbag through the air pump 401 to make it expand, and an electronic valve is set in the air outlet pipe 4011. After it is full, the electronic valve is closed to avoid gas leakage. After use, the electronic valve is opened to discharge the gas for easy use next time.

[0035] The utility model coats the slurry while stirring it with a stirring paddle 5, and at the same time ensures that the contact time between the slurry and the air is short, and the stability of the slurry is guaranteed. The speed of discharging is controlled by the amount of slurry used for coating, so that the slurry does not agglomerate during the coating process. The operation is simple, and the stability of the coating surface density can be guaranteed, thereby improving the consistency of the battery cell capacity.

[0036] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and inventive concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A device for preventing agglomeration of positive electrode slurry in sodium battery coating, comprising a bracket (1) and a storage tank (2), wherein the storage tank (2) is mounted on the bracket (1) and contains positive electrode slurry (3), characterized in that: Also includes: A sealing cover (4) connected to the storage tank (2); A stirring paddle (5) is rotatably connected to the storage tank (2); A nitrogen pipeline (6) is fixedly connected to the sealing cover (4), and the nitrogen pipeline (6) is used to inject nitrogen into the storage tank (2). The nitrogen pipeline (6) is externally connected to a control switch for controlling the amount of gas; A discharge pipe (9) is connected to the bottom of the storage tank (2); A discharge switch (8) is connected to the discharge pipe (9).

2. The device for preventing agglomeration of positive electrode slurry for coating sodium batteries according to claim 1, characterized in that: The sealing cover (4) is fixedly connected to a motor (501), the output end of the motor (501) passes through the sealing cover (4), and the output end of the motor (501) is fixedly connected to the stirring paddle (5).

3. The device for preventing agglomeration of positive electrode slurry for coating sodium batteries according to claim 1, characterized in that: An annular air bag (402) for filling the gap between the sealing cover (4) and the storage tank (2) is connected to the outer ring of the sealing cover (4).

4. The device for preventing agglomeration of positive electrode slurry for coating sodium batteries according to claim 3, characterized in that: The sealing cover (4) is connected to a second annular airbag (403) for filling the output shaft of the motor (501).

5. The device for preventing agglomeration of positive electrode slurry for coating sodium batteries according to claim 4, characterized in that: The sealing cover (4) is connected to an air pump (401), and an air outlet pipe (4011) is connected to the air outlet end of the air pump (401). The air outlet pipe (4011) is used to supply air to the annular airbag 1 (402) and the annular airbag 2 (403).

6. The device for preventing agglomeration of positive electrode slurry for coating sodium batteries according to claim 2, characterized in that: The storage tank (2) is connected to a controller (7) for controlling the rotation speed of the stirring paddle (5).

7. The device for preventing agglomeration of positive electrode slurry for coating sodium batteries according to claim 1, characterized in that: The sealing cover (4) is connected to a mounting frame (404), and the mounting frame (404) is connected to a threaded rod, through which the sealing cover (4) can be mounted on the storage tank (2).

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